public class test {
    public static void main(String[] args) {
        int a=10;
        int b=20;
        --a;
        System.out.println(a);
        a--;
        System.out.println(a);
        ++a;
        System.out.println(a);
        a++;
        System.out.println(a);
        int c=a+b;
        System.out.println(c);
        System.out.println(10/3);
        System.out.println(10/3.0);
        System.out.println(10%3);
        System.out.println(10%-3);
        System.out.println(-10%-3);
        System.out.println(-10%3);
        System.out.println(11.5%2);

    }
}
